Kingdom Animalia Linnaeus, 1758 - animals Count: - Phylum Mollusca Linnaeus, 1758 - molluscs Count: - Class Gastropoda Cuvier, 1795 - snails and slugs Count: - Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Count: - Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods Count: - Family Ovulidae Fleming, 1822 - egg snails Count: - Genus Ovula Bruguière, 1789 Count: -